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Author Palmeira, António L. ♦ Sardinha, Luís B. ♦ Minderico, Cláudia S. ♦ Serpa, Sidónio O. ♦ Barata, José T. ♦ Martins, Sandra S. ♦ Branco, Teresa L. ♦ Teixeira, Pedro J.
Source Directory of Open Access Journals (DOAJ)
Content type Text
Publisher BioMed Central
File Format HTM / HTML
Date Created 2007-05-06
Copyright Year ©2007
Language English
Subject Domain (in LCC) RC620-627 ♦ RA1-1270
Subject Keyword Nutritional diseases ♦ Deficiency diseases ♦ Public aspects of medicine ♦ Internal medicine ♦ Medicine ♦ Specialties of internal medicine
Abstract Abstract Background This study was conceived to analyze how exercise and weight management psychosocial variables, derived from several health behavior change theories, predict weight change in a short-term intervention. The theories under analysis were the Social Cognitive Theory, the Transtheoretical Model, the Theory of Planned Behavior, and Self-Determination Theory. Methods Subjects were 142 overweight and obese women (BMI = 30.2 ± 3.7 kg/m <sup>2</sup>; age = 38.3 ± 5.8y), participating in a 16-week University-based weight control program. Body weight and a comprehensive psychometric battery were assessed at baseline and at program's end. Results Weight decreased significantly (-3.6 ± 3.4%, p < .001) but with great individual variability. Both exercise and weight management psychosocial variables improved during the intervention, with exercise-related variables showing the greatest effect sizes. Weight change was significantly predicted by each of the models under analysis, particularly those including self-efficacy. Bivariate and multivariate analyses results showed that change in variables related to weight management had a stronger predictive power than exercise-specific predictors and that change in weight management self-efficacy was the strongest individual correlate (p < .05). Among exercise predictors, with the exception of self-efficacy, importance/effort and intrinsic motivation towards exercise were the stronger predictors of weight reduction (p < .05). Conclusion The present models were able to predict 20–30% of variance in short-term weight loss and changes in weight management self-efficacy accounted for a large share of the predictive power. As expected from previous studies, exercise variables were only moderately associated with short-term outcomes; they are expected to play a larger explanatory role in longer-term results.
ISSN 14795868
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article
Publisher Date 2007-04-01
e-ISSN 14795868
Journal International Journal of Behavioral Nutrition and Physical Activity
Volume Number 4
Issue Number 1
Starting Page 14


Source: Directory of Open Access Journals (DOAJ)